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By Dra O
posted a while back - it was running at one point - I have all the plastic shroud off - it's down to frame and engine now
-fuel pump: when line from petcock is attached, no fuel comes out other side to carb; the line to the carb is open (can blow through it); I thought when I cranked engine that the pump would spit out fuel on other side but it does not; I removed fuel pump and opened it up - diaphragm looks good - but internal areas had lotsa calcification build up - I cleaned this out and dried it good - the clear plastic pieces (?diaphragms) aren't broken - the spring w/ steel ball on end moves freely; am putting it back on tomorrow; but can anyone answer about the pump? isn't it supposed to pump fuel through it... to other side... to carb? puzzling
-along with fuel pump: I replaced petcock 3 weeks ago (gas tank had rusty fuel in bottom - cleaned it out prior to new petcock); when I turn petcock arrow NOT to on or reserve, fuel comes out of line; when I turn it to on or reserve, fuel doesn't come out; puzzling
-I don't know what's on back of fuel pump - it's a valve that has a hose coming out of it - looks like it goes to engine/carb - I haven't traced this out yet - what is it?
-can squirt gas on air filter and engine will run for 2-3 seconds then stop - fuel in top of carb (under diaphragm) does same
-it likely needs carb rebuild - will get to this - but something isn't allowing fuel to get from fuel pump to carb
-I THINK it has a mikuni model x carb - diaphragm is ID 26mm OD 68mm - hard to find inexpensive diaphragm, I guess because it's a model x
-last thing - I replaced solenoid due to old one clicking; I HAVE to be charging the battery or it won't start/turn over - battery just goes dead; but if charging, it'll turn over nicely; i'm guessing it's a bad battery
-any help appreciated - I've never owned an ATV before - inherited this beast from grandparent in-law
So a few weeks ago ended up buying a 02 Bayou 300 for 100.00
Get there to see it and motor was gone through and parts missing, stuff not connected
and a big freekin bucket of parts and bolts. He said had no power and mechanic said it was
the wrist pin. Ended up leaving it in pieces and left like that. I end up getting most of it back together
and manage to get it to fire up. I drive it and has no power! No missing just no power. I figure check
the timing chain as he did replace that. Well I spin the motor over and guess what!
A blind guy could have done a better jobs. Just one question, I loosen the top bolt on the tensioner then remove it
right? Nothing is gonna fall inside the motor is it? just making sure, need this out before I can move the cam gear
to the right location. Thanks in advance Az
Hi, I have just purchased a 2002 Yamaha Kodiak 400 I think, the vin has worn off and I have located an engine number I think it is J312E-004674, could anyone tell me where the engine number might be please
By Gary Skriba
just got a 99 Kawasaki bayou replace the coil because the spark was very weak still have the same issue before it would start after a while that it would start everyday as long as you started it every day but if you let it set you play hell starting it looking for information on what could possibly be wrong maybe the CDI box not sure any help would greatly be appreciated thank you
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Hi everyone, I received a 98 Yamaha Timberwolf from my brother for free, and I'm working on getting it going.
I am having the following problem:
The engine is backfiring through the carb.
I have done the following to try and get the four wheeler running:
Rebuilt the carb and set the air screw to 1-1/4 turn out and the circlip at middle position 3
Replaced the coil, because the cable was loose at the coil end
Repaired the main ground, coming from the battery
Replaced the ignition switch, because my brother couldn't find the key. New switch tested good
Tested the kill switch and it tested good
New coil tested goodfor both primary and secondary coils
Pickup coil resistance is at 195, which is correct
My source coil, is where I believe the issue is. The resistance is 310ohms, and it should be between 428-523ohms
When I opened the stator housing, there was significant oil, which I have read is normal. Does it sound like I'm on the right track replacing the source coil? Could this be causing my backfiring issue? It looks like the source coil is part of the stator assembly, is this correct? 4BD-85510-20-00 STATOR ASSY
I'm new to this forum and I hope you can help me out. My '99 Polaris 250 Trail boss does this: shifting in to forward the gears grind a bit. Once in gear the rig wants to immediately move forward. If I don't get to the throttle fast enough, she stalls.If I do, off we go. It happens everytime I shift into gear.Could this be caused by dirt inside the clutch sheaves causing the belt to engage early (before any throttle input)? Or what??? Thanks in advance.
Hi, does anyone know where to find the timing marks on the camshaft and how to orient them? I found the line on the crank and lined it up with the arrow on the case, but the only marks I can see on the cam are on the very end where the black plastic cap is. Are these the timing marks and if so how do you line them up?
I have a really dumb question. My big bear came half apart and I am not sure how the timing chain guide is supposed to sit in there. I have the entire top end cleaned, bored, new piston, gaskets, etc. I do not see anywhere in any manual or thread where it shows how the chain guide is installed or held on place????? Also should it be the same height as the other side???
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